WO2005081886A3 - Cinema fiber optic platform - Google Patents

Abstract

An optical fiber-based distribution system for converting color video and stereo audio electrical signals for transmission over the fewest possible number of optical fiber cables and for then re-converting such signals back to electrical format for use at each projection room in a multi-theater complex. The color video signals include the red R, green G and blue B color video signals and attendant synchronization signals, horizontal synch H and vertical synch V. The audio signals include left L and right R channel stereo signals. The five electrical video signals R, G, B, V, H are converted in an RGB transmitter to three distinct optical signals for transmission over three fiber optic cables and the two electrical audio stereo signals L, R are converted in a stereo audio transmitter for transmission over one fiber optic cable. The three optical signals from the RGB transmitter are then re-converted in a remote receiver back into the R, G, B, V, H electrical signals while the one optical signal from the stereo audio transmitter is re-converted in a remote receiver back into the L, R electrical signals. Wavelength division multiplexing may be employed to transmit all of the optical signals of video modulation on just one fiber optic cable. Audio modulation optical signals may also be transmitted over the same fiber optic cable using wavelength division modulation.